Best Robot Vacuums is reader-supported. When you buy through links on our site, we may earn a commission. Details.
We may earn a commission when you buy through links on this page. Learn more.
Dreame L40 Ultra vs Roborock QV 35A
The Dreame L40 Ultra wins with a score of 8.4/10. Best for: Pet households with mostly hard floors and large open spaces.
Winner
Dreame L40 Ultra
8.4/10$599
The Dreame L40 Ultra delivers near-flagship cleaning performance and the longest battery efficiency we've measured at a mid-range price.
Read full review
Score Comparison
Dreame L40 UltraRoborock QV 35A
Overall
8.48.0
Hard Floor
9.08.8
Carpet
8.07.5
Mopping
8.58.0
Navigation
8.88.2
Noise
7.59.0
Smart Features
8.58.5
Maintenance
8.88.0
Specifications
| Dreame L40 Ultra | Spec | Roborock QV 35A |
|---|---|---|
| $599 | Price | $400 |
| 11000 | Suction (Pa) | 8000 |
| 5200 | Battery (mAh) | 5200 |
| 65.0 | Noise (dB) | 45.0 |
| — | Dustbin (ml) | 330 |
| — | Water Tank (ml) | — |
| 10.5 | Mop Lift (mm) | 10.0 |
| — | Height (mm) | — |
| — | Weight (kg) | 2.7 |
| LiDAR + 3D Structured Light | Navigation | PreciSense LiDAR |
| ✅ | Self-Empty | ✅ |
| ✅ | Self-Wash Mop | ✅ |
| ✅ | Self-Dry Mop | ✅ |
| ✅ | AI Obstacle | ✅ |
Pros & Cons
Dreame L40 Ultra
Pros
- + 11,000Pa suction handles hard floors with ease
- + Class-leading battery efficiency (194 min runtime)
- + TriCut anti-tangle brush handles long hair well
- + 60°C hot water mop wash and auto-dry
- + Built-in voice control + Matter, Alexa, Google, HomeKit
Cons
- − Lower carpet performance vs flagship X40
- − Mop pad retention occasionally drops a pad
- − Louder than premium competitors at full power
- − Mopping won't replace deep manual cleaning on heavy stains
Roborock QV 35A
Pros
- + 8,000Pa HyperForce suction
- + Auto mop wash and dry dock
- + Anti-tangle spiral rubber brush
- + Very quiet — 45dB in standard mode
- + 180-min runtime covers large homes
- + Multi-floor mapping (up to 4 floors)
Cons
- − Struggles on high-pile and shag carpet
- − No hot water mop wash
- − Reactive Tech obstacle avoidance stumbles on dark floors
- − Reports of occasional dock water leaks
- − Fixed mop arms (no extending edge-mop)
The Verdict
The Dreame L40 Ultra is the better choice with an overall score of 8.4/10 — best for pet households with mostly hard floors and large open spaces. The Roborock QV 35A is more affordable at $400 vs $599.